Quote:
Originally Posted by Jack_O
I have one main concern with OPR. I only had time to briefly look over how it is calculated, but what I saw troubled me. One teams OPR is influenced by their alliance partners. This influence may not be very big, but it can add up. If a team goes to an event where the teams are generally "good", then their OPR will be higher. The opposite happens when the teams are generally bad. Most OPR stats are seperated by less than one point. As a result, one match with bad partners could screw everything up.
That is just my two cents. If I am wrong, or if I misunderstood something, please let me know.
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First of all, I just publish the numbers and provide means for other teams to use the data and to calculate the OPR during a competition. How they use the data is up to them.
My team does pit scouting, collect data of every robot of every match and combine that with OPR/CCWM to come up with a pick list. I don't advocate using only OPR. There are two circumstances I can think of that it is useful. When we were a rookie team, we had 6 students on the team, 4 of them were on the field or in the queue line most of the time, leaving only 2 students in the stand. In between matches, they were fixing and getting the robot ready for the next match. That year we used strictly OPR for first pick and CCWM for second pick. It was better than nothing.
The other way I would use OPR is if I was not at the competition so other means of scouting is not possible. The data tells me a lot about the teams. This data is very useful at the Championship when you have not seen how the other 99 robots in your division play, especially in the early matches.
The last time I check, the winner of the alliance is the one who can score more points. Offense is definitely important. However another way to look at it is if my alliance plays in such a way that we can create a positive point differential, my alliance will win. Three defensive teams, no matter how good they are at it, will never win a match. The best they can do is to tie it. You need at least one robot on the alliance that has sufficient offensive power to win.
Oh I almost forgot to answer this new posters question. You are absolutely wrong. Let me give you a simple example. I see you are also from Michigan. Let's say the district event has 40 teams. Let's say all teams except yours score exactly 20 points per match and your robot score 10 points. The calculated OPR is 20 for every other team and 10 for your team. Let's say you go to your second district and every robot there can score 40 points per match and your robot score 10 points per match. The OPR will be exactly 40 for all other teams and your team's OPR is still 10. So you are wrong to think that your OPR will be higher because you play in higher scoring matches. If you don't contribute to the higher score, you get nothing higher in your OPR.